- Some dinosaurs had tails over 13m (45 feet) long.
- The wristwatch was invented in 1904.
- Fresh apples float because they contain 25% air.
- Einstein slept 10 hours a night.
- An average person will spend 25 years asleep.
- Dolphins can kill sharks by ramming them with their snout.
- When a koala is born, it is about the size of a jelly bean.
- The corkscrew was invented in 1890.
- The expression to 'knuckle down' originated from playing marbles (players used to put their knuckles to the ground for their best shots).
- Chinese mathematics developed around the 11th century BC and included important concepts related to negative numbers, decimals, algebra and geometry.
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